Earthquake with magnitude of ML 0.5 on date 21-11-2021 and time 19:18:05 (Italy) in region 4 km W Sellano (PG)

A magnitude ML 0.5 earthquake occured in region: 4 km W Sellano (PG), on

  • 21-11-2021 18:18:05 (UTC)
  • 21-11-2021 19:18:05 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.878, 12.877 at 10 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

Search earthquakes: Any within 30 km radius

The values of hypocentral coordinates and magnitude may be revised at a later time as more information becomes available.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Sellano PG 4 1079 1079
Cerreto di Spoleto PG 7 1075 2154
Campello sul Clitunno PG 10 2442 4596
Trevi PG 10 8469 13065
Vallo di Nera PG 12 364 13429
Preci PG 13 724 14153
Sant'Anatolia di Narco PG 16 564 14717
Monte Cavallo MC 17 145 14862
Foligno PG 17 57155 72017
Castel Ritaldi PG 18 3278 75295
Montefalco PG 18 5679 80974
Visso MC 18 1107 82081
Scheggino PG 19 461 82542
Poggiodomo PG 19 117 82659
Spoleto PG 19 38218 120877

Municipalities with at least 50000 inhabitants

An earthquake occurred to
17 Km SE of Foligno (57155 inhabitants)
40 Km NE of Terni (111501 inhabitants)
47 Km SE of Perugia (166134 inhabitants)
72 Km W of Teramo (54892 inhabitants)
73 Km NW of L'Aquila (69753 inhabitants)
81 Km NE of Viterbo (67173 inhabitants)
97 Km SW of Ancona (100861 inhabitants)
98 Km N of Guidonia Montecelio (88673 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Preliminary map of the earthquake effects from the web questionnaire

Preliminary map of the earthquake effects from the web questionnaire

This map shows the distribution of earthquake resentment in the area, expressed in terms of intensity on the MCS scale (Mercalli-Cancani-Sieberg). Intensities are determined using data from questionnaires collected on the website http://www.hsit.it. The intensities shown are determined considering all the reports received from each municipality, and are all the more reliable the greater the number of questionnaires. The collected data are subjected to an automatic statistical filter, but are not checked individually. In particular, intensities greater than or equal to the VI degree of the MCS or EMS scale require on-site verification by specialized personnel. The black star is the epicenter of the earthquake that occurred. This map is updated every time citizens fill out new questionnaires. The number of questionnaires processed to obtain this map, the date and time of the last update are shown at the top right.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100
ML 0.5 2021-11-21
18:18:05
42.8782 12.8767 10 2021-11-21
18:31:36
Sala Sismica INGV-Roma 97664221
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-11-21 18:18:05 ± 0.06
Latitude 42.8782 ± 0.0027
Longitude 12.8767 ± 0.0061
Depth (km) 10 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 97664221

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 424
Semi-minor axis of confidence ellipse (meter) 299
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 92
Circular confidence region, given by single value of horizontal uncertainty (meter) 420
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 76
Number of associated phases, regardless of their use for origin computation 32
Number of defining phases 19
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.2
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.32106
Number of stations at which the event was observed 23
Number of stations from which data was used for origin computation 10
Magnitude information

ML:0.5

Field Value
Value 0.5
Uncertainty 0.4
Num. used stations 12
Type of magnitude ML
Reference to an origin 97664221
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-11-21 18:31:36
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
HL.VLS.HHZ. 2021-11-21T18:19:56.86 3.0 positive manual Pn 4.87 0
IV.PZUN.HHZ. 2021-11-21T18:19:48.71 3.0 undecidable manual Sg 19.450001 0
IV.GIZZ.HHZ. 2021-11-21T18:19:32.19 3.0 negative manual Pg 20.200001 0
IX.SNR3.EHZ.02 2021-11-21T18:19:21.57 3.0 undecidable manual Sn 1.62 0
IV.CAR1.HNZ. 2021-11-21T18:19:11.91 3.0 undecidable manual Pn 3.01 0
GU.BURY.HHZ. 2021-11-21T18:19:11.27 3.0 negative manual Pg 11.55 0
IV.SENA.HHZ. 2021-11-21T18:19:03.67 3.0 undecidable manual Pg 9.26 0
IX.SCL3.EHZ.02 2021-11-21T18:19:00.81 3.0 undecidable manual Pg 12.01 0
IV.SARZ.HHZ. 2021-11-21T18:18:59.11 3.0 negative manual Pg 6.12 0
IV.MNTV.EHZ. 2021-11-21T18:18:46.14 3.0 negative manual Pg 3.28 0
IV.BRSN.EHZ. 2021-11-21T18:18:42.74 3.0 undecidable manual Sg -2.36 0
IV.TREG.EHZ. 2021-11-21T18:18:40.63 3.0 negative manual Pn -5.08 0
IV.RMP.HHZ. 2021-11-21T18:18:19.28 3.0 positive manual Pg -2.72 0
IV.CSP1.EHZ. 2021-11-21T18:18:17.70 0.3 undecidable manual S 48 0.3211 50 0.09 71
IV.LNSS.HNE. 2021-11-21T18:18:17.00 0.3 undecidable manual S 156 0.3004 50 0.01 73
IV.MML1.HNN. 2021-11-21T18:18:15.30 0.3 undecidable manual S 16 0.2455 50 -0.06 73
IV.MOMA.HNN. 2021-11-21T18:18:15.10 0.6 undecidable manual S 252 0.2365 50 0 49
IV.ASSB.HHE. 2021-11-21T18:18:14.60 0.3 undecidable manual S 316 0.2284 50 -0.27 70
IV.NRCA.HHZ. 2021-11-21T18:18:13.20 0.1 undecidable manual S 104 0.1799 117 -0.08 98
IV.GAVE.EHZ. 2021-11-21T18:18:13.40 0.3 undecidable manual S 176 0.1862 117 -0.11 73
IV.CSP1.EHZ. 2021-11-21T18:18:12.44 0.6 positive manual P 48 0.3211 50 -0.04 48
IV.LNSS.HNE. 2021-11-21T18:18:12.14 0.1 undecidable manual P 156 0.3004 50 0.02 97
IV.CESI.HHZ. 2021-11-21T18:18:11.60 0.1 undecidable manual S 9 0.1286 126 0.01 100
IT.MTCL.HGE. 2021-11-21T18:18:11.90 0.3 undecidable manual S 38 0.1466 123 -0.27 71
IV.ASSB.HHE. 2021-11-21T18:18:11.62 0.3 undecidable manual P 316 0.2284 50 0.71 61
IV.MML1.HNN. 2021-11-21T18:18:11.09 0.1 undecidable manual P 16 0.2455 50 -0.09 96
IV.FDMO.HHZ. 2021-11-21T18:18:10.80 0.1 undecidable manual P 44 0.2212 50 0.03 98
IV.MOMA.HNN. 2021-11-21T18:18:10.65 0.3 undecidable manual P 252 0.2365 50 -0.39 68
IV.NRCA.HHZ. 2021-11-21T18:18:10.04 0.6 undecidable manual P 104 0.1799 117 0.06 49
IV.GAVE.EHZ. 2021-11-21T18:18:10.31 0.3 positive manual P 176 0.1862 117 0.2 71
IV.CESI.HHZ. 2021-11-21T18:18:09.15 0.6 undecidable manual P 9 0.1286 126 0.14 49
IT.MTCL.HGE. 2021-11-21T18:18:09.45 0.1 undecidable manual P 38 0.1466 123 0.12 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CESI.HHE. ML:0 4.155E-5 0.22 AML other m 2021-11-21T18:18:12.01
IV.CESI.HHN. ML:0 4.555E-5 0.14 AML other m 2021-11-21T18:18:12.21
IX.SNR3.EHN.02 ML:2.8 7.775E-5 0.36 AML other m 2021-11-21T18:19:41.90
IX.SNR3.EHE.02 ML:2.4 3.225E-5 0.98 AML other m 2021-11-21T18:19:42.61
IV.NRCA.HHE. ML:0 1.7491685E-5 0.1664 AML other m 2021-11-21T18:18:14.30
IV.NRCA.HHN. ML:0 1.776995E-5 0.0896 AML other m 2021-11-21T18:18:13.89
IV.GAVE.EHE. ML:0 1.5473705E-5 0.1408 AML other m 2021-11-21T18:18:14.56
IV.GAVE.EHN. ML:0 1.5828085E-5 0.1792 AML other m 2021-11-21T18:18:14.39
IV.FDMO.HHE. ML:0 1.1459138E-5 0.1792 AML other m 2021-11-21T18:18:14.82
IV.FDMO.HHN. ML:0 9.2586655E-6 0.1408 AML other m 2021-11-21T18:18:14.57
IV.CSP1.EHE. ML:0 1.2176555E-5 0.5248 AML other m 2021-11-21T18:18:19.28
IV.CSP1.EHN. ML:0 1.3946735E-5 0.1536 AML other m 2021-11-21T18:18:17.84
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download